中国水产科学2017，Vol.24Issue(1)：120-135,16.DOI:10.3724/SP.J.1118.2017.16095
南海中南部中层鱼资源声学积分值及时空分布初探
Preliminary study on the nautical area scattering coefficient and distribution of mesopelagic fish species in the central-southern part of the South China Sea
摘要
Abstract
Two acoustical surveys were conducted using a Simrad EK60 scientific echosounder (38 kHz split-beam transducer) in the Nansha,Zhongsha,and Xisha areas during spring 2013 and 2014 to explore the abundance and spatiotemporal distribution of mesopelagic fish species in the central-southern part of the South China Sea.The abundance and distribution were estimated using the echo-integration method based on acoustic data and mid-water trawl samples.We identified 79 fish and squid species in 60 genera,37 families,16 orders,and 3 classes in the Zhongsha and Xisha areas during spring 2014.Osteichthyes was the most abundant (65 species),followed by Coleoidea (13 species),and Chondrichthyes was only represented by one species.Stomiidae,Myctophidae,and Gonostomidae (Osteichthyes) were the most abundant families and were represented by 20,13,and 6 species,respectively.The nautical area scattering coefficient (NASC,m2/nmi2)of mesopelagic fish in the Nansha area was much lower than that in the Zhongsha and Xisha areas,and the former presented more obvious ascending intensity at night.The NASC composition of fish living in 10-200 m depth range at night was not different from that of fish living in 200-1000 m during the day in the Nansha area in Spring of 2013,but the difference was significant in the Zhongsha and Xisha areas in spring of 2014.The NASC composition values of fish living in 200-1000 m during the day for the different latitude scopes in the Nansha,Zhongsha,and Xisha areas were significantly different.The NASC of mesopelagic fish in the central-southern part of the South China Sea was (2387±601) m2/nmi2.We estimated the abundance of mesopelagic fish in the central-southern part of the South China Sea to be (82±21) million tons based on the existing mesopelagic fish target strength parameters and the median value.These results indicate that the NASC of mesopelagic fish in the central-southern part of the South China Sea was 29.2％ higher than the global average.Mesopelagic fish are a potential major strategic fishery resource and are very important for China to develop.关键词
中层鱼/积分值/时空分布/声学评估/南海Key words
mesopelagic fish/nautical area scattering coefficient/spatial-temporal distribution/acoustical estimation/South China Sea分类
农业科技引用本文复制引用
张俊,江艳娥,陈作志,龚玉艳,陈国宝..南海中南部中层鱼资源声学积分值及时空分布初探[J].中国水产科学,2017,24(1):120-135,16.基金项目
农业部财政专项项目(NFZX2013) （NFZX2013）
国家重点基础研究发展计划项目(2014CB441500) （2014CB441500）
农业部财政专项项目(2009-2016) （2009-2016）
中央级公益性科研院所基本科研业务费专项资金项目(2014TS18) （2014TS18）
农业部南海渔业资源开发利用重点实验室开放基金(FREU2016-01). （FREU2016-01）
